Katheryn Elizabeth Hudson (born October 25, 1984), better known by her stage name Katy Perry, is an American singer-songwriter and musician. Her albums include Katy Hudson, One of the Boys, and Teenage Dream. Popular songs include Ur So Gay, I Kissed a Girl, Hot N Cold, Thinking of You, Waking Up in Vegas, California Gurls, Teenage Dream, Firework, E.T., Last Friday Night (T.G.I.F.).